/* Counter controlled loop */

#include <stdio.h>
#define MIN 1
#define MAX 20

int main(void) {
  int counter, sum = 0;

  /* Sum of all integers from MIN to MAX */  
  for(counter = MIN; counter <= MAX; counter++){
     sum += counter;
  }

  /* Report the output */
  printf("The sum of integers between %d and %d is %d\n", 
         MIN, MAX, sum);

  return 0;
}